In a future Japan divided into several small nations after the collapse of civilization, this is a rise-to-power harem story depicting battles and adventures woven between the protagonist who has obtained the strongest level of power and several girls. The protagonist, who has time-slipped into a post-civilization-collapse future where special powers have become commonplace, takes up work as an "excavator," uncovering modern machine parts, products, metals and other items said to be relics from the mythological age based on memories and knowledge from that era. Furthermore, the protagonist encounters a beautiful girl in that land. This girl is the grown-up version of the neighbor's only daughter who was caught up in the time transfer before it happened—a young girl who adored him saying "I love you, big brother." That neighbor has become a Grand Duke ruling that land. ※Book version Volume 1 released on December 25, 2015. Book version Volume 2 released on February 25, 2016. Book version Volume 3 released on November 10, 2016.
| Word | Frequency | Difficulty |
|---|---|---|
| 渋面 | 1 | 4.55 |
| 死亡 | 1 | 3.75 |
| 未満 | 1 | 4.44 |
| 大振り | 1 | 4.48 |
| 罰 | 1 | 3.70 |
| 放り込み | 1 | 4.69 |
| ニコッと | 1 | 4.79 |
| 蓼 | 1 | 5.05 |
| 引きあげる | 1 | 5.45 |
| 一刻 | 1 | 4.39 |
| 序 | 1 | 3.94 |
| 食い放題 | 1 | 5.83 |
| 競う | 1 | 4.23 |
| 胸中 | 1 | 4.02 |
| 物事 | 1 | 3.93 |
| 最大規模 | 1 | 4.99 |
| クリ | 1 | 4.78 |
| 質の高い | 1 | 5.32 |
| 穴埋め | 1 | 4.94 |
| ぐるりと | 1 | 4.00 |
| 羽子 | 1 | 3.71 |
| 団扇 | 1 | 5.22 |
| 免 | 1 | 4.71 |
| ずる賢い | 1 | 5.55 |
| ピンク色 | 1 | 4.23 |
| 識別 | 1 | 4.04 |
| 冱えない | 1 | 4.65 |
| 意識体 | 1 | 5.26 |
| しーっ | 1 | 5.24 |
| 国民的 | 1 | 5.20 |
| 専門的 | 1 | 4.70 |
| イマジネーション | 1 | 5.77 |
| 絶滅 | 1 | 4.48 |
| 土気色 | 1 | 5.12 |
| 初桜 | 1 | 7.59 |
| 体型 | 1 | 3.99 |
| 純金 | 1 | 5.22 |
| 酔う | 1 | 3.78 |
| 薬草 | 1 | 3.50 |
| 第一陣 | 1 | 4.71 |
| 着こなし | 1 | 4.75 |
| 広範 | 1 | 5.42 |
| 作す | 1 | 4.62 |
| 釣竿 | 1 | 4.80 |
| 退散 | 1 | 4.35 |
| 引っこ抜く | 1 | 4.53 |
| 焼きもち | 1 | 4.88 |
| 後衛 | 1 | 3.77 |
| 動機 | 1 | 4.23 |
| 待機 | 1 | 3.37 |
| 兵数 | 1 | 4.52 |
| 尻 | 1 | 3.75 |
| 用途 | 1 | 4.03 |
| 段違い | 1 | 4.36 |
| 膠 | 1 | 4.77 |
| 手立て | 1 | 4.41 |
| 新品 | 1 | 4.41 |
| 解禁 | 1 | 4.64 |
| 思わしい | 1 | 4.50 |
| 若造 | 1 | 4.36 |
| 股間 | 1 | 4.27 |
| 愛情表現 | 1 | 4.94 |
| 好条件 | 1 | 4.81 |
| 南西 | 1 | 4.30 |
| 身の毛 | 1 | 4.82 |
| 体操 | 1 | 4.26 |
| 都市部 | 1 | 4.68 |
| 追い出す | 1 | 3.77 |
| 作戦命令 | 1 | 6.16 |
| 怪異 | 1 | 4.64 |
| こすれ合う | 1 | 5.78 |
| 味を調える | 1 | 5.80 |
| たとき | 1 | 5.35 |
| 境目 | 1 | 4.59 |
| 具 | 1 | 2.87 |
| 干渉 | 1 | 3.54 |
| フィット感 | 1 | 5.91 |
| 食い逃げ | 1 | 5.51 |
| ばくち打ち | 1 | 6.64 |
| アメジスト | 1 | 4.93 |
| うまく行く | 1 | 5.32 |
| 出端 | 1 | 4.63 |
| 呵々 | 1 | 4.29 |
| 産物 | 1 | 4.37 |
| 応急策 | 1 | 7.42 |
| ぶつかり合い | 1 | 4.45 |
| 埼玉 | 1 | 5.22 |
| 残りわずか | 1 | 5.30 |
| 嫌になる | 1 | 4.52 |
| 時点 | 1 | 3.13 |
| 掠る | 1 | 4.53 |
| 驚かせる | 1 | 4.66 |
| 四倍 | 1 | 4.91 |
| 軍事行動 | 1 | 4.59 |
| 晴れやかな笑顔 | 1 | 5.23 |
| 場違い | 1 | 4.19 |
| アピール | 1 | 3.80 |
| くっつける | 1 | 4.20 |
| 永遠 | 1 | 3.70 |
| 叩きのめす | 1 | 4.95 |
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